Class 10 Science Chapter 5 Life Processes: Nutrition Concept Clarity MCQs with Answers

 Practice these 10 Concepts Clarity MCQs to strengthen your understanding of Chapter 1. These questions are designed according to the CBSE syllabus.

Concept Clarity MCQs

Q1. Which of the following is a heterotrophic organism?

a) Cyanobacteria (b) Fungi (c) Plants (d) None of these 

Q2. What is the end product of photosynthesis except glucose?

a) Oxygen (b) water (c) both a and b (d) none of these 

Q3. Through which of the following does gaseous exchange not occur?

a) stems (b) roots (c) leaves (d) none of these 

Q4. In which form do plants absorb nitrogen from soil?

a) Nitrogen gas (b) Nitrogen dioxide (c) inorganic nitrates or nitrites (d) none of these  

Q5. Which of the following organisms breaks down food outside the body and then absorbs it?

a) Mushroom (b) Cuscuta (c) Leeches (d) None of these 

Q6. Where does digestion begin in the human alimentary canal?

a) Small intestine (b) Stomach (c) Pancreas (d) Mouth

Q7. Which of the following is digested by salivary amylase?

a) Protein (b) Starch (c) Fat (d) All of these  

Q8. What is the function of HCl in our stomach?

a) To kill micro-organisms (b) To activate pepsin (c) Both a and b (d) none of these 

Q9. Which is the longest part of the human alimentary canal?

a) Large intestine (b) Small intestine (c) Liver (d) Oesophagus

Q10. Pancreatic enzymes function effectively in which of the following media?

a) Neutral (b) Acidic (c) Alkaline (d) All of these 

Q11. Why can a single-celled organism survive without specialised organs for respiration or transport?

a) It does not require oxygen.
b) Every part of its body is in direct contact with the environment.
c) It produces its own oxygen.
d) It stores enough oxygen for life.

Q12. Which of the following is NOT a function of the transportation system?

a) Carrying oxygen to cells
b) Carrying food to different body parts
c) Transporting useful substances between organs
d) Digesting food inside the stomach

Q13. Which type of chemical reactions are commonly involved in breaking down food molecules to release energy?

a) Neutralisation reactions
b) Oxidation-reduction (redox) reactions
c) Double displacement reactions
d) Combination reactions

Q14. After digestion in Amoeba, the digested food:

a) Is stored permanently in the food vacuole.
b) Diffuses into the cytoplasm.
c) Is immediately thrown out of the cell.
d) Moves into the nucleus.

Q15. Unlike Amoeba, Paramecium takes in food:

a) Through any part of its body surface.
b) Through a specific spot on its body.
c) Through its pseudopodia.
d) Through pores in its cell wall.

Q16. Herbivores have a longer small intestine mainly because:

a) Grass occupies more space.
b) Cellulose requires more time and surface area for digestion.
c) They eat more frequently.
d) Their stomach is smaller.

Q17. The primary role of the large intestine is to:

a) Digest proteins completely.
b) Absorb most of the nutrients.
c) Absorb water from undigested food.
d) Produce digestive enzymes.

Q18. Villi are present mainly to:

A) Secrete digestive juices.
B) Increase the surface area for absorption.
C) Store digested food.
D) Produce bile.

Q19. Which sequence correctly shows the final products of digestion?

a) Proteins → Glucose; Carbohydrates → Amino acids; Fats → Glycerol
b) Proteins → Amino acids; Carbohydrates → Glucose; Fats → Fatty acids + Glycerol
c) Proteins → Peptides; Carbohydrates → Maltose; Fats → Fat globules
d) Proteins → Lipids; Carbohydrates → Cellulose; Fats → Amino acids

Q20. Why must the acidic food from the stomach be made alkaline before pancreatic enzymes act?

a) Pancreatic enzymes function best in an alkaline medium.
b) Acid destroys glucose.
c) Proteins digest only in alkaline conditions.
d) Fats become acidic.

🧠 TopperGuru1 Concept Check

Before checking the answer key, ask yourself these two questions for every MCQ:

✅ Why is the correct option right?

✅ Why are the other three options wrong?

If you can explain both, your concept is truly clear. If not, revise the related NCERT concept and try again.

Remember: Real learning happens when you understand the reason, not when you memorize the answer.

Answer Key: 

1. (b) | 2. (c) | 3. (d) | 4. (c) | 5. (a) | 6. (d) | 7. (b) | 8. (c) | 9. (b) | 10. (c) 11. (b) | 12. (d) | 13. (b) | 14. (b) | 15. (b) | 16. (b) | 17. (c) | 18. (b) | 19. (b) | 20. (a)